from django.test import TestCase
import datetime
from django.utils import timezone
from django.urls import reverse
from .models import Question
# Create your tests here.

def create_question(question_text,days):
    time = timezone.now() + datetime.timedelta(days=days)
    return Question.objects.create(question_text=question_text,pud_date=time)

class QuestionModelTests(TestCase):
    def test_was_published_recently_with_future_question(self):
        time = timezone.now() + datetime.timedelta(days=30)
        future_question = Question(pud_date=time)
        self.assertIs(future_question.was_published_recently(),False)

    def test_no_questions(self):
        response = self.client.get(reverse('polls:index'))
        self.assertEqual(response.status_code,200)
        self.assertContains(response,"No polls are available.")
        self.assertQuerysetEqual(response.context['latest_question_list'],[])

    def test_past_question(self):
        create_question(question_text="Past question.",days=-30)
        response = self.client.get(reverse('polls:index'))
        self.assertQuerysetEqual(
            response.context['latest_question_list'],
            ['<Question:Past question.>']
        )

    def test_future_question(self):
        create_question(question_text="Future question.",days=30)
        response = self.client.get(reverse('polls:index'))
        self.assertContains(response,"No polls are available.")
        self.assertQuerysetEqual(response.context['latest_question_list'],[])

    def test_future_question_and_past_question(self):
        create_question(question_text="Past question.",days=-30)
        create_question(question_text="Future question.",days=30)
        response = self.client.get(reverse('polls:index'))
        self.assertQuerysetEqual(
            response.context['latest_question_list'],
            ['<Question:Past question.>']
        )

    def test_two_past_question(self):
        create_question(question_text="Past question 1.",days=-30)
        create_question(question_text="Past question 2.",days=-5)
        reponse = self.client.get(reverse('polls:index'))
        self.assertQuerysetEqual(
            reponse.context['latest_question_list'],
            ['<Question:Past question 2.>','<Question:Past question 1.>']
        )

class QuestionDetailViewTests(TestCase):
    def test_future_question(self):
        future_question = create_question(question_text='Future question.',days=5)
        url = reverse('polls:detail',args=(future_question.id,))
        response = self.client.get(url)
        self.assertEqual(response.status_code,404)

    def test_past_question(self):
        past_question = create_question(question_text="Past Question.",days=-5)
        url = reverse('polls:detail',args=(past_question.id,))
        response = self.client.get(url)
        self.assertContains(response,past_question.question_text)